Magneto-optics of a two-dimensional electron gas confined in Cd1-xMnxTe quantum wells

We report on magneto-optical experiments on n-modulation doped, diluted mag netic semiconductor (DMS) quantum wells (QW's). A realignment of electronic spins induced by exchange interaction with magnetic ions is clearly observ ed. Sets of "regular free-particle like" transitions have been identified. The appearance of the subsequent satellite emission lines and the striking behaviour of the ground state emission are speculatively assigned to many b ody effects and/or to field induced localisation in a quantum Hall system w ith clearly resolved spin states. (C) 1998 Elsevier Science B.V. All rights reserved.